Pretty nice 2D platformer, a bit too hard for me maybe, I only managed to get to the first boss once in 30 minutes.
I don't mind the speed of the game but sometimes I wouldn't have the time to react to certain obstacles like lasers or spikes when entering a room or when you are falling.
I didn't understand what the slot machine was the first couple of time, maybe add a slot machine sfx.
Overall pretty nice, reminded me of VVVVV.